scholarly journals REMAZOL RED DYE REMOVAL IN WATER SOLUTIONS USING A MIXED ADSORVENT COMPOSED OF ASPERGILLUS NIGER AND ELEPHANT GRASS

2021 ◽  
Vol 10 (3) ◽  
pp. 358
Author(s):  
Andressa Nathally Rocha Leal ◽  
Luana Beatriz Correia de Oliveira ◽  
Alice Da Conceição Alves de Lima ◽  
Maurício Fonsêca de Aguiar ◽  
Joyce Silva ◽  
...  

O descarte de efluentes têxteis não tratados nos meios aquosos pode ocasionar em um rápido esgotamento do oxigênio dissolvido, o que resulta em um desequilíbrio noecossistema. São vários os métodos utilizados na remoção de cor, e, dentre eles, a adsorção vem se mostrando como um método de tratamento simples, barato e eficiente. O objetivo deste trabalho consiste em avaliar a habilidade da biomassa mista de Aspergillus niger e capim elefante (Penissetum purpureum Schum) na remoção do corante Remazol Vermelho de uma solução aquosa sintética sob difrentes condições de temperatura (30, 40 e 50 °C), concentrações variando entre 25 e 105 mg/L, tempo de adsorção de 0 a 200 minutos e pH 2.0. O estudo cinético foi caracterizado pelo modelo de pseudo-segunda ordem. Já o modelo de Langmuir se mostrou o melhor ajuste linear das isotermas de adsorção, apresentando uma capacidade de adsorção de 3,42 mg g-1. A esponteneidade da reação de adsorção foi avaliada através daenergia lvire de Gibbs. O estudo termodinâmico indicou que a adsorção é favorável e espontânea, além de que o aumento da temperatura ocasiona em uma redução na capacidade de adsorção. Estes resultados obtidos em efluentes sintéticosdemonstram que o adsorvente misto produzido neste estudo é uma alternativa promissora no tratamento de efluentes contaminados com Remazol Vermelho.

2021 ◽  
Vol 226 ◽  
pp. 408-418
Author(s):  
Sofiah Hamzah ◽  
Ng Boon Swan ◽  
Nurul Ashraf Razali ◽  
Nurul Aqilah Mohammad ◽  
Nazaitulshila Rasit ◽  
...  

2020 ◽  
Vol 11 (3) ◽  
pp. 10006-10015

This study aimed to evaluate the effectiveness of bio-adsorbent from coconut husk for the removal of remazol red dye. The characteristics of coconut husk bio adsorbent are studied using Fourier transform infrared (FT-IR) and scanning electron microscope (SEM). The effects of different types of adsorbent and the effects of initial dye concentration on the removal of remazol red dyes were evaluated. The results showed that the percentage removal of remazol red dye by the treated bio adsorbent is higher compared to the untreated bio adsorbent, especially by activated coconut husk with 5 hours burning time in the furnace. The SEM results also show that the treated bio adsorbent morphology is more porous and rougher to improve the adsorption process. Meanwhile, FTIR analysis shows the reduction of peaks because of the removal of much lignin and hemicelluloses. The best adsorbent recorded is activated coconut husk at 5 hours burning time when it achieved 75% removal.


2016 ◽  
Vol 295 (1) ◽  
pp. 227-236 ◽  
Author(s):  
Miguel A. Corona-Rivera ◽  
Víctor M. Ovando-Medina ◽  
Luis A. Bernal-Jacome ◽  
Elsa Cervantes-González ◽  
Iveth D. Antonio-Carmona ◽  
...  

2021 ◽  
Vol 765 (1) ◽  
pp. 012089
Author(s):  
R Taufik ◽  
M Mohamad ◽  
R Wannahari ◽  
N F Shoparwe ◽  
WHW Osman ◽  
...  

2021 ◽  
pp. 111492
Author(s):  
Dang Le Tri Nguyen ◽  
Quach An Binh ◽  
Xuan Cuong Nguyen ◽  
Thi Thanh Huyen Nguyen ◽  
Quang Nha Vo ◽  
...  

Processes ◽  
2020 ◽  
Vol 8 (6) ◽  
pp. 653 ◽  
Author(s):  
Nina Mladenovic ◽  
Petre Makreski ◽  
Anita Tarbuk ◽  
Katia Grgic ◽  
Blazo Boev ◽  
...  

To improve the ability of the rice husk to purify colored wastewater, effluent from the alkaline scouring of cotton yarn was used immediately after the scouring (without cooling and additionally added chemicals) in order to remove the non-cellulosic silicon-lignin shield from the rice husk’s surface. This rice husk, with 93.8 mg/g adsorption capacity, behaves similarly as the rice husk treated with an optimized alkaline scouring recipe consisting of 20 g/L NaOH, 2 mL/L Cotoblanc HTD-N and 1 mL/L Kemonecer NI at 70 °C for 30 min with an adsorption capacity of 88.9 mg/g of direct Congo red dye. Treating one form of waste (rice husk) with another (effluent from the alkaline scouring of cellulosic plant fibers), in an effort to produce a material able to purify colored effluent, is an elegant environment-friendly concept based on the circular economy strategy. This will result in a closed-loop energy-efficient process of the pre-treatment of cotton (alkaline scouring), modification of rice husk using effluent from the alkaline scouring, dyeing cotton fabrics and cleaning its colored effluents with modified rice husk without adding chemicals and energy for heating.


2020 ◽  
Vol 8 (1) ◽  
pp. 103618 ◽  
Author(s):  
Ana Carolina de Lima Barizão ◽  
Marcela Fernandes Silva ◽  
Murilo Andrade ◽  
Fernanda Caroline Brito ◽  
Raquel Guttierres Gomes ◽  
...  

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